Just to refresh the discussion,
Bob's original statement was that he has PS1 engines on a Z-1000 and they all run fine. He was asking about PS2/3 engines he may get.
In response to his original question...PS2/3 engines will all run fine on all Z-xxx controllers AND via DCS Fixed or DCS Variable. Previous discussions aside, I have never heard anything to the contrary.
Keystone asked about TIU outputting less than 5 volts. The new update 4.3 will allow Variable output voltages starting at 1 volt.
Ed